ADU Permits: Castro Valley vs Hayward
How do adu permits rules compare between Castro Valley, CA and Hayward, CA?
Castro Valley, CA
Alameda County
No data available yet for Castro Valley.
Hayward, CA
Alameda County
Hayward processes Accessory Dwelling Unit and Junior ADU permits ministerially under Hayward Municipal Code section 10-1.2740 (Chapter 10 Zoning, Article 1) and California Government Code 65852.2 and 65852.22. Applications are filed with the Hayward Planning Division / Development Services Center. State law requires the City to act on a complete application within 60 days.
View full Hayward rules →Key Facts Comparison
| Fact | Castro Valley | Hayward |
|---|---|---|
| Code Section | - | HMC 10-1.2740 |
| Review Type | - | Ministerial (no hearing) |
| Decision Window | - | 60 days from complete app |
| Allowed Units | - | 1 ADU + 1 JADU per SFR lot |
| Max Detached ADU | - | 1,200 sq ft, 16 ft tall (default) |
Highlighted rows indicate differences between cities.
Castro Valley FAQ
No FAQs available.
Hayward FAQ
How long does an ADU permit take in Hayward?
California Government Code 65852.2(b)(1) and HMC 10-1.2740 require Hayward to act on a complete ADU application within 60 days. Practical timelines depend on plan-check corrections - expect 3-6 months from submittal to permit issuance through the Hayward Development Services Center.
Does Hayward hold a public hearing on ADU applications?
No. HMC 10-1.2740 implements California Government Code 65852.2 and makes ADU/JADU permits ministerial. Hayward applies objective standards only - no Planning Commission hearing, no neighborhood notice, and no discretionary design review.
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